Synchronization Distribution Requirements Sample Clauses

Synchronization Distribution Requirements. 15.3.3.1 Central Office BITS shall contain redundant clocks meeting or exceeding the requirements for a stratum 3 enhanced clock as specified in ANSI T1.101-1994 and Bellcore GR-1244 Clocks for the Synchronized Network: Common Generic Criteria. 15.3.3.2 Central Office BITS shall be powered by primary and backup power sources. 15.3.3.3 If both reference inputs to the BITS are interrupted or in a degraded mode (meaning off frequency greater than twice the minimum accuracy of the BITS, loss of frame, excessive bit errors, or in alarm indication signal), then the stratum clock in the BITS shall provide the necessary bridge in timing to allow the network to operate without a frame repetition or deletion (slip free) with better performance than 1 frame repetition or deletion (slip) per week. 15.3.3.4 DS1s multiplexed into a SONET synchronous payload envelope within an STS-n (where n is defined in ANSI T1.105-1995) signal shall not be used as reference facilities for network synchronization. 15.3.3.5 The total number of Network Elements cascaded from the stratum 1 source shall be minimized. 15.3.3.6 A Network Element shall receive the synchronization reference signal only from another Network Element that contains a clock of equivalent or superior quality (stratum level). 15.3.3.7 BA shall select for synchronization those facilities shown to have the greatest degree of availability (absence of outages). 15.3.3.8 Where possible, all primary and secondary synchronization facilities shall be physically diverse (this means the maximum feasible physical separation of synchronization equipment and cabling). 15.3.3.9 No timing loops shall be formed in any combination of primary and secondary facilities. 15.3.3.10 An operations support system (OSS) shall continuously monitor the BITS for synchronization related failures or degradation. 15.3.3.11 An OSS shall continuously monitor all equipment transporting synchronization facilities for synchronization related failures or degradation. 15.3.3.12 For non-SONET equipment, BA shall provide synchronization facilities which, at a minimum, comply with the standards set forth in ANSI T1.101-1994. 15.3.3.13 All equipment approved for deployment in BA’s network shall meet Bellcore GR-253 and GR-1244 requirements.
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Synchronization Distribution Requirements. 18.4.3.1 Central office BITS shall contain redundant clocks meeting or exceeding the requirements for a stratum 3 clock as specified in ANSI T1.101-1994 and ANSI TI.105.09 and Bellcore GR-NWT-001244 Clocks for the Synchronized Network: Common Genetic Criteria. 18.4.3.2 Central office BITS shall be powered by primary and backup power sources. 18.4.3.3 If both reference inputs to the BITS are interrupted or in a degraded mode (meaning off frequency greater than twice the minimum accuracy of the BITS, loss of frame, excessive bit errors, or in Alarm Indication Signal), then the stratum clock in the BITS shall provide the necessary bridge in timing to allow the network to operate without a frame repetition or deletion (slip free)
Sample 1
Synchronization Distribution Requirements. 15.4.3.1 Central office BITS shall contain redundant clocks meeting or exceeding the requirements for a stratum 2 clock as specified in ANSI T1.101-1994 and Bellcore TR-NWT-001244 Clocks for the Synchronized Network: Common Genetic Criteria. 15.4.3.2 Central office BITS shall be powered by primary and backup power sources. 15.4.3.3 If both reference inputs to the BITS are interrupted or in a degraded mode (meaning off frequency greater than twice the minimum accuracy of the BITS, loss of frame, excessive bit errors, or in Alarm Indication Signal), then the stratum clock in the BITS shall provide the necessary bridge in timing to allow the network to operate without a frame repetition or deletion (slip free) with better performance than 1 frame repetition or deletion (slip) per week. 15.4.3.4 DS1s multiplexed into a SONET synchronous payload envelope within an STS-n (where n is defined in ANSI T1.105-1995) signal shall not be used as reference facilities for network synchronization.
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